<template>
    <div>
        <!--        面包屑导航栏-->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>
        <!--        卡片视图-->
        <el-card>
            <!--            提示信息-->
            <el-alert
                    title="添加商品信息"
                    type="info"
                    center
                    show-icon :closable="false">
            </el-alert>
            <!--            步骤条-->
            <!--            字符串型数字减0将其转化为数字型-->
            <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>
            <!--            tabs栏区-->
            <el-form :model="addForm" :rules="addFormRules" ref="ruleFormRef" label-width="100px" label-position="top">
                <el-tabs tab-position="left" v-model="activeIndex" :before-leave="beforeLeave" @tab-click="tableClick">
                    <el-tab-pane label="基本信息" name="0">
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格" prop="goods_price">
                            <el-input v-model="addForm.goods_price" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="addForm.goods_weight" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品数量" prop="goods_number">
                            <el-input v-model="addForm.goods_number" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品分类" prop="goods_cat">
                            <!--                            级联选择去-->
                            <el-cascader
                                    v-model="addForm.goods_cat"
                                    :options="cateList"
                                    :props="cateProps"
                                    @change="handleChange"></el-cascader>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name="1">
                        <el-form-item v-for="item in manyTableData" :key="item.attr_id" :label="item.attr_name">
                            <!--                            多选框数组-->
                            <el-checkbox-group v-model="item.attr_vals">
                                <el-checkbox :label="item1" v-for="(item1,index) in item.attr_vals"
                                             border></el-checkbox>
                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name="2">
                        <el-form-item v-for="item in onlyTableData" :key="item.attr_id" :label="item.attr_name">
                            <el-input v-model="item.attr_vals"></el-input>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name="3">
                        <!--                        文件上传-->
                        <el-upload
                                :headers="headerObj"
                                :on-success="handleSuccess"
                                :action="uploadURL"
                                :on-preview="handlePreview"
                                :on-remove="handleRemove"
                                list-type="picture">
                            <el-button size="small" type="primary">点击上传</el-button>
                        </el-upload>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name="4">
                        <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                        <el-button type="primary" @click="addGoods" class="addBtn">添加商品</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>
        </el-card>
        <!--        图片预览dialog-->
        <el-dialog
                title="图片预览"
                :visible.sync="previewVisible"
                width="50%">
            <img :src="previewPath" alt="" class="previewImg">
        </el-dialog>
    </div>
</template>

<script>
    import _ from 'lodash'

    export default {
        name: "Add",
        data() {
            return {
                activeIndex: '0',
                addForm: {
                    goods_name: '',
                    goods_price: 1,
                    goods_weight: 1,
                    goods_number: 1,
                    // 分类数组
                    goods_cat: [],
                    pics: [],
                    goods_introduce: '',
                    attrs: []

                },
                addFormRules: {
                    goods_name: [
                        {required: true, message: '请输入商品名称', trigger: 'blur'},
                    ],
                    goods_price: [
                        {required: true, message: '请输入商品价格', trigger: 'blur'},
                    ],
                    goods_weight: [
                        {required: true, message: '请输入商品重量', trigger: 'blur'},
                    ],
                    goods_number: [
                        {required: true, message: '请输入商品数量', trigger: 'blur'},
                    ],
                    goods_cat: [
                        {required: true, message: '请选择类别', trigger: 'blur'},
                    ]
                },
                // 分类列表
                cateList: [],
                // 级联选择器
                cateProps: {
                    label: 'cat_name',
                    value: 'cat_id',
                    children: 'children',
                    expandTrigger: 'hover'
                },
                // 商品参数
                manyTableData: [],
                onlyTableData: [],
                // 商品图片
                uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
                headerObj: {
                    Authorization: window.sessionStorage.getItem('token')
                },
                previewPath: '',
                previewVisible: false,
            }
        },
        created() {
            this.getCateList()
        },
        methods: {
            async getCateList() {
                const res = (await this.$http.get('categories')).data
                if (res.meta.status !== 200) {
                    return this.$message.error({
                        message: '请求分类列表失败!',
                        center: true
                    })
                } else {
                    this.cateList = res.data
                    // console.log(res);
                }
            },
            handleChange() {
                if (this.addForm.goods_cat.length !== 3) {
                    this.addForm.goods_cat = []
                }
            },
            beforeLeave(activeName, oldActiveName) {
                // activeName:即将进入的标签页
                // oldActiveName:即将离开的标签页
                if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
                    this.$message.error({
                        message: '请先选择商品分类',
                        center: true
                    })
                    return false
                }
            },
            async tableClick() {
                if (this.activeIndex === '1') {
                    const res = (await this.$http.get(`categories/${this.cateId}/attributes`, {params: {sel: 'many'}})).data
                    if (res.meta.status !== 200) {
                        console.log(res);
                        return this.$message.error({
                            message: '获取动态参数失败!',
                            center: true
                        })
                    } else {
                        res.data.forEach(item => {
                            item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ")
                        })
                        this.manyTableData = res.data
                    }
                } else if (this.activeIndex === '2') {
                    const res = (await this.$http.get(`categories/${this.cateId}/attributes`, {params: {sel: 'only'}})).data
                    if (res.meta.status !== 200) {
                        console.log(res);
                        return this.$message.error({
                            message: '获取静态属性失败!',
                            center: true
                        })
                    } else {
                        this.onlyTableData = res.data
                        console.log(res);
                    }
                }
            },
            handlePreview(file) {
                this.previewPath = file.response.data.url
                this.previewVisible = true
            },
            handleRemove(file) {
                const filePath = file.response.data.tmp_path
                const index = this.addForm.pics.findIndex(item => {
                    return item.pic === filePath
                })
                this.addForm.pics.splice(index, 1)
            },
            handleSuccess(response) {
                const picInfo = {pic: response.data.tmp_path}
                this.addForm.pics.push(picInfo)
            },
            addGoods() {
                this.$refs.ruleFormRef.validate(async valid => {
                    if (!valid) {
                        return this.$message.error({
                            message: '请将必要信息填写完整!',
                            center: true
                        })
                    } else {
                        // 处理动态参数
                        this.manyTableData.forEach(item => {
                            const newInfo = {
                                attr_id: item.attr_id,
                                attr_value: item.attr_vals.join(' ')
                            }
                            this.addForm.attrs.push(newInfo)
                        })
                        // 处理静态属性
                        this.onlyTableData.forEach(item => {
                            const newInfo = {
                                attr_id: item.attr_id,
                                attr_value: item.attr_vals.join(' ')
                            }
                            this.addForm.attrs.push(newInfo)
                        })
                        // 深拷贝
                        const form = _.cloneDeep(this.addForm)
                        form.goods_cat = form.goods_cat.join(',')
                        const res = (await this.$http.post('goods', form)).data
                        if (res.meta.status !== 201) {
                            console.log(res);
                            return this.$message.error({
                                message: res.meta.msg,
                                center: true
                            })
                        } else {
                            this.$message.success({
                                message: '添加商品成功！',
                                center: true
                            })
                            await this.$router.push('/goods')
                        }
                    }
                })
            }
        },
        computed: {
            cateId() {
                if (this.addForm.goods_cat.length === 3) {
                    return this.addForm.goods_cat[2]
                } else {
                    return null
                }
            }
        }
    }
</script>

<style scoped>
    .el-steps {
        margin: 15px 0;
    }

    .el-checkbox {
        margin: 0 15px 0 0 !important;
    }

    .previewImg {
        width: 100%;
    }

    .addBtn {
        margin-top: 15px;
    }

</style>